import axios from 'axios'
import {Loading, Message, MessageBox, Notification} from 'element-ui'
import store from '@/store'
import {getToken} from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import {blobValidate, tansParams} from "@/utils/ruoyi";
import cache from '@/plugins/cache'
import {saveAs} from 'file-saver'

let downloadLoadingInstance;
// 是否显示重新登录
export let isReLogin = {show: false};

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
axios.defaults.headers['Referer'] = 'http://admin.sit.com/fileManage/homeManage/carousel.do?menuId=164';

// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 60000,
  method: "post"
})

// request拦截器
service.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
    config.headers['j-token'] = getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }

  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method
      === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data)
          : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                  // 请求地址
      const s_data = sessionObj.data;                // 请求数据
      const s_time = sessionObj.time;                // 请求时间
      const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval
          && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ` + message)
        // return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
  console.log(error)
  Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {

      // 未设置状态码则默认成功状态
      const code = res.data.code || 200;
      // 获取错误信息
      const msg = errorCode[code] || res.data.msg || errorCode['default']
      // 二进制数据则直接返回
      if (res.request.responseType === 'blob' || res.request.responseType
          === 'arraybuffer') {
        return res.data
      }
      if (code === 401) {
        if (!isReLogin.show) {
          isReLogin.show = true;
          MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录',
              '系统提示', {
                confirmButtonText: '重新登录',
                cancelButtonText: '取消',
                type: 'warning'
              }).then(() => {
            isReLogin.show = false;
            store.dispatch('LogOut').then(() => {
              location.href = '/index';
            })
          }).catch(() => {
            isReLogin.show = false;
          });
        }
        return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
      } else if (code === 500) {
        Message({message: msg, type: 'error'})
        return Promise.reject(new Error(msg))
      } else if (code === 601) {
        Message({message: msg, type: 'warning'})
        return Promise.reject('error')
      } else if (code !== 200) {
        Notification.error({title: msg})
        return Promise.reject('error')
      } else {
        return res.data
      }
    },
    error => {
      console.log('err' + error)
      let {message} = error;
      if (message == "Network Error") {
        message = "后端接口连接异常";
      } else if (message.includes("timeout")) {
        message = "系统接口请求超时";
      } else if (message.includes("Request failed with status code")) {
        message = "系统接口" + message.substr(message.length - 3) + "异常";
      }
      Message({message: message, type: 'error', duration: 5 * 1000})
      return Promise.reject(error)
    }
)

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({
    text: "正在下载数据，请稍候",
    spinner: "el-icon-loading",
    background: "rgba(0, 0, 0, 0.7)",
  })
  return service.post(url, params, {
    transformRequest: [(params) => {
      return tansParams(params)
    }],
    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
    responseType: 'blob',
    ...config
  }).then(async (data) => {
    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg
          || errorCode['default']
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

export function downloadForm(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({
    text: "正在下载数据，请稍候",
    spinner: "el-icon-loading",
    background: "rgba(0, 0, 0, 0.7)",
  })
  return service.post(url, params, {
    data: params,
    headers: {'Content-Type': 'application/json'},
    responseType: 'blob',
    ...config
  }).then(async (data) => {

    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg
          || errorCode['default']
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

export default service
